The most likely reason the author included the class discussion with the tour guide was to
1) create a sense of unity despite colin's withdrawn attitude
2) provide a bit of action to a mostly internal discussion
3) teach a valuable lesson about participating in class discussions
4) use the students' comments and behavior to contrast with colin

c. with one finger is the answer

common stockholders usually have the right to vote on major issues affecting the company, like mergers and liquidation of the corporation's assets. they also have part ownership of the company which can then be traded on a secondary market (the stock exchange).

explanation:

if you don't mind posting the paragraph so i could read it that would a lot. (;